South Korea made a declaration of carbon neutrality in 2020 and subsequently adjusted its targets for reducing greenhouse gas emissions. Specifically, a goal of 40% reduction by 2030 was set, with particular emphasis on the building sector targeting a 32.8% reduction compared to the 2018 baseline. In pursuit of carbon neutrality, the study emphasizes imperative strategies like zero-energy construction for new buildings and green remodeling for existing structures, aimed at enhancing overall energy efficiency. It proposes the development of scenarios to compute carbon emissions during building operations, utilizing established life cycle assessment methodologies. This includes a quantitative assessment of carbon emissions resulting from remodeling activities in existing buildings, aligning them with the prescribed reduction targets. Two primary scenarios are under consideration: evaluating emissions during a building"s operational life cycle until dismantlement without remodeling, and assessing both energy conservation and emissions when remodeling occurs after 15 years of operation. The aim to study resides in establishing a strategy for achieving carbon neutrality in buildings, accentuating the significance of comprehensive evaluations and strategies that harmonize sustainable construction practices with emission reduction objectives.